body {
  font-size: 16px;
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  text-align: center;
  color: #333;
}

h1 {
  color: red;
}

p {
  line-height: 1.5;
}

#calc-btn {
  font-size: 1.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid #333;
  background-color: #fff;
  color: #333;
  cursor: pointer;
}

#calc-btn:hover {
  background-color: #333;
  color: #fff;
}

.cycle {
  font-size: 1.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid #333;
  background-color: #fff;
  color: #333;
  margin: 0.5rem;
}